I would look at white MK like these :- https://www.screwfix.com/p/mk-essentials-13a-2-gang-sp-switched-socket-2-4a-2-outlet-usb-charger-white-with-colour-matched-inserts/434ht
Kensington stuff is OK but I would trust MK to have a more reliable transformer in them. Unless your walls are really dark white would probably look better. Are the sockets not going to be covered up?
What about something like this? https://www.elesi.com/soho-lighting-white-primed-flat-plate-13a-2-gang-dp-usb-switched-socket-usb-output-48amp-wht-ins-screwless#additional
We got Schneider ultimate screwless flat plate which are really nicely finished. Their dimmers for LED are quite expensive though.
They look pretty generic to me. I suppose that's why I end up relying on a brand name.
@Tenderloin started
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I would look at white MK like these :- https://www.screwfix.com/p/mk-essentials-13a-2-gang-sp-switched-socket-2-4a-2-outlet-usb-charger-white-with-colour-matched-inserts/434ht
Kensington stuff is OK but I would trust MK to have a more reliable transformer in them. Unless your walls are really dark white would probably look better. Are the sockets not going to be covered up?